chrome/browser/ui: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

chrome/browser/ui/tabs/hover_tab_selector.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/tabs/hover_tab_selector.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
-#include "base/message_loop/message_loop.h"
+#include "base/location.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 
 HoverTabSelector::HoverTabSelector(
     TabStripModel* tab_strip_model)
     : tab_strip_model_(tab_strip_model),
       tab_transition_tab_index_(-1),
       weak_factory_(this) {
   DCHECK(tab_strip_model_);
 }
 
 HoverTabSelector::~HoverTabSelector() {
 }
 
 void HoverTabSelector::StartTabTransition(int index) {
   // If there is a transition underway already, only start a new
   // transition (canceling the old one) if the target tab differs.
   if (weak_factory_.HasWeakPtrs()) {
     if (index == tab_transition_tab_index_)
       return;
     CancelTabTransition();
   }
   // Start a new transition if the target isn't active already.
   if (index != tab_strip_model_->active_index()) {
     // The delay between beginning to hover over a tab and the transition
     // to that tab taking place.
     const base::TimeDelta kHoverTransitionDelay =
         base::TimeDelta::FromMilliseconds(500);
     tab_transition_tab_index_ = index;
-    base::MessageLoop::current()->PostDelayedTask(
-        FROM_HERE,
-        base::Bind(&HoverTabSelector::PerformTabTransition,
-                   weak_factory_.GetWeakPtr()),
+    base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
+        FROM_HERE, base::Bind(&HoverTabSelector::PerformTabTransition,
+                              weak_factory_.GetWeakPtr()),
         kHoverTransitionDelay);
   }
 }
 
 void HoverTabSelector::CancelTabTransition() {
   weak_factory_.InvalidateWeakPtrs();
 }
 
 void HoverTabSelector::PerformTabTransition() {
   DCHECK(tab_transition_tab_index_ >= 0 &&
          tab_transition_tab_index_ < tab_strip_model_->count());
   tab_strip_model_->ActivateTabAt(tab_transition_tab_index_, true);
 }